jdbc pool java连接池技术

ConnectPool .java: package pool; /** * Title: ConnectPool.Java * Description: 连接池治理器 * Copyright: Copyright (c) 2002/12/25 * Company: * Author : * Version 2.0 */ import java.io.*; import java.sql.*; import java.util.*; import java.util.Date; /** * 治理类DBConnectionManager支持对一个或多个由属性文件定义的数据库连接 * 池的访问.客户程序可以调用getInstance()方法访问本类的唯一实例. */ public class ConnectPool { static public ConnectPool instance; // 唯一实例 static public int clients; public Vector drivers = new Vector(); //驱动 public PrintWriter log; public Hashtable pools = new Hashtable(); //连接 /** * 返回唯一实例.假如是第一次调用此方法,则创建实例 * * @return DBConnectionManager 唯一实例 */ static synchronized public ConnectPool getInstance() { if (instance == null) { instance = new ConnectPool(); } clients++; return instance; } /** * 返回唯一实例.假如是第一次调用此方法,则创建实例 * * @return DBConnectionManager 唯一实例 */ static synchronized public ConnectPool getInstance(String url) { if (instance == null) { instance = new ConnectPool(url); } clients++; return instance; } /** * 建构函数私有以防止其它对象创建本类实例 */ public ConnectPool() { init(); } /** * 建构造带参数的函数 * */ public ConnectPool(String url) { init(url); } /** * 将连接对象返回给由名字指定的连接池 * * @param name 在属性文件中定义的连接池名字 * @param con 连接对象 */ public void freeConnection(String name, Connection con) { DBConnectionPool pool = (DBConnectionPool) pools.get(name); if (pool != null) { pool.freeConnection(con); } else { // System.out.println("pool ==null"); } clients--; } /** * 获得一个可用的(空闲的)连接.假如没有可用连接,且已有连接数小于最大连接数 * 限制,则创建并返回新连接 * * @param name 在属性文件中定义的连接池名字 * @return Connection 可用连接或null */ public Connection getConnection(String name) { DBConnectionPool pool = (DBConnectionPool) pools.get(name); if (pool != null) { //return pool.getConnection(); return pool.returnConnection(); } return null; } /** * 获得一个可用连接.若没有可用连接,且已有连接数小于最大连接数限制, * 则创建并返回新连接.否则,在指定的时间内等待其它线程释放连接. * * @param name 连接池名字 * @param time 以毫秒计的等待时间 * @return Connection 可用连接或null */ public Connection getConnection(String name, long time) { DBConnectionPool pool = (DBConnectionPool) pools.get(name); if (pool != null) { return pool.getConnection(time); } return null; } /** * 关闭所有连接,撤销驱动程序的注册 */ public synchronized void release() { // 等待直到最后一个客户程序调用 if (--clients != 0) { return; } Enumeration allPools = pools.elements(); while (allPools.hasMoreElements()) { DBConnectionPool pool = (DBConnectionPool) allPools.nextElement(); pool.release(); } Enumeration allDrivers = drivers.elements(); while (allDrivers.hasMoreElements()) { Driver driver = (Driver) allDrivers.nextElement(); try { DriverManager.deregisterDriver(driver); log("撤销JDBC驱动程序 " + driver.getClass().getName() + "的注册"); } catch (SQLException e) { log(e, "无法撤销下列JDBC驱动程序的注册: " + driver.getClass().getName()); } } } /** * 根据指定属性创建连接池实例. * * @param props 连接池属性 */ private void createPools(Properties props) { Enumeration propNames = props.propertyNames(); while (propNames.hasMoreElements()) { String name = (String) propNames.nextElement(); if (name.endsWith(".url")) { String poolName = name.substring(0, name.lastIndexOf(".")); String url = props.getProperty(poolName + ".url"); if (url == null) { log("没有为连接池" + poolName + "指定URL"); continue; } String user = props.getProperty(poolName + ".user"); String passWord = props.getProperty(poolName + ".password"); String maxconn = props.getProperty(poolName + ".maxconn", "0"); int max; try { max = Integer.valueOf(maxconn).intValue(); } catch (NumberFormatException e) { log("错误的最大连接数限制: " + maxconn + " .连接池: " + poolName); max = 0; } DBConnectionPool pool = new DBConnectionPool(poolName, url, user, passWord, max); pools.put(poolName, pool); log("成功创建连接池" + poolName); } } } /** * 读取属性完成初始化 */ private void init() { try { Properties p = new Properties(); String configs = System.getProperty("user.dir") + "//conf//poolName.properties"; //String configs = System.getProperty("user.dir") + "//conf//poolName.properties"; //System.out.println("configs file local at " + configs); FileInputStream is = new FileInputStream(configs); Properties dbProps = new Properties(); try { dbProps.load(is); } catch (Exception e) { System.err.println("不能读取属性文件. " + "请确保db.properties在CLASSPATH指定的路径中"); return; } String logFile = dbProps.getProperty("logfile", "DBConnectionManager.log"); try { log = new PrintWriter(new FileWriter(logFile, true), true); } catch (IOException e) { System.err.println("无法打开日志文件: " + logFile); log = new PrintWriter(System.err); } loadDrivers(dbProps); createPools(dbProps); } catch (Exception e) {} } /** * 读取属性完成初始化 */ private void init(String url) { try { Properties p = new Properties(); String configs = System.getProperty("user.dir") + "//conf//"+url; //System.out.println("configs file local at " + configs); FileInputStream is = new FileInputStream(configs); Properties dbProps = new Properties(); try { dbProps.load(is); } catch (Exception e) { System.err.println("不能读取属性文件. " + "请确保db.properties在CLASSPATH指定的路径中"); return; } String logFile = dbProps.getProperty("logfile", "DBConnectionManager.log"); try { log = new PrintWriter(new FileWriter(logFile, true), true); } catch (IOException e) { System.err.println("无法打开日志文件: " + logFile); log = new PrintWriter(System.err); } loadDrivers(dbProps); createPools(dbProps); } catch (Exception e) {} } /** 171 * 装载和注册所有JDBC驱动程序 172 * 173 * @param props 属性 174 */ private void loadDrivers(Properties props) { String driverClasses = props.getProperty("drivers"); StringTokenizer st = new StringTokenizer(driverClasses); while (st.hasMoreElements()) { String driverClassName = st.nextToken().trim(); try { Driver driver = (Driver) Class.forName(driverClassName).newInstance(); DriverManager.registerDriver(driver); drivers.addElement(driver); //System.out.println(driverClassName); log("成功注册JDBC驱动程序" + driverClassName); } catch (Exception e) { log("无法注册JDBC驱动程序: " + driverClassName + ", 错误: " + e); } } } /** * 将文本信息写入日志文件 */ private void log(String msg) { log.println(new Date() + ": " + msg); } /** * 将文本信息与异常写入日志文件 */ private void log(Throwable e, String msg) { log.println(new Date() + ": " + msg); e.printStackTrace(log); } /** * 此内部类定义了一个连接池.它能够根据要求创建新连接,直到预定的最 * 大连接数为止.在返回连接给客户程序之前,它能够验证连接的有效性. */ class DBConnectionPool { //private int checkedOut; private Vector freeConnections = new Vector(); private int maxConn; private String name; private String password; private String URL; private String user; /** * 创建新的连接池 * * @param name 连接池名字 * @param URL 数据库的JDBC URL * @param user 数据库帐号,或 null * @param password 密码,或 null * @param maxConn 此连接池答应建立的最大连接数 */ public DBConnectionPool(String name, String URL, String user, String password, int maxConn) { this.name = name; this.URL = URL; this.user = user; this.password = password; this.maxConn = maxConn; } /** * 将不再使用的连接返回给连接池 * * @param con 客户程序释放的连接 */ public synchronized void freeConnection(Connection con) { // 将指定连接加入到向量末尾 try { if (con.isClosed()) { // System.out.println("before freeConnection con is closed"); } freeConnections.addElement(con); Connection contest = (Connection) freeConnections.lastElement(); if (contest.isClosed()) { // System.out.println("after freeConnection contest is closed"); } notifyAll(); } catch (SQLException e) { // System.out.println(e); } } /** * 从连接池获得一个可用连接.如没有空闲的连接且当前连接数小于最大连接 * 数限制,则创建新连接.如原来登记为可用的连接不再有效,则从向量删除之, * 然后递归调用自己以尝试新的可用连接. */ public synchronized Connection getConnection() { Connection con = null; if (freeConnections.size() > 0) { // 获取向量中第一个可用连接 con = (Connection) freeConnections.firstElement(); freeConnections.removeElementAt(0); try { if (con.isClosed()) { log("从连接池" + name + "删除一个无效连接"); System.out.println("从连接池" + name + "删除一个无效连接"); // 递归调用自己,尝试再次获取可用连接 con = getConnection(); } } catch (SQLException e) { log("从连接池" + name + "删除一个无效连接时错误"); System.out.println("从连接池" + name + "删除一个无效连接出错"); // 递归调用自己,尝试再次获取可用连接 con = getConnection(); } if (freeConnections.size() > maxConn) { System.out.println(" 删除一个溢出连接 "); releaseOne(); } } else if ((maxConn == 0) || (freeConnections.size() < maxConn)) { con = newConnection(); } return con; } public synchronized Connection returnConnection() { Connection con = null; //假如闲置小于最大连接,返回一个新连接 if (freeConnections.size() < maxConn) { con = newConnection(); } //假如闲置大于最大连接，返回一个可用的旧连接 else if (freeConnections.size() >= maxConn) { con = (Connection) freeConnections.firstElement(); System.out.println(" [a 连接池可用连接数 ] : " + "[ " + freeConnections.size() + " ]"); freeConnections.removeElementAt(0); System.out.println(" [b 连接池可用连接数 ] : " + "[ " + freeConnections.size() + " ]"); try { if (con.isClosed()) { log("从连接池" + name + "删除一个无效连接"); System.out.println("从连接池" + name + "删除一个无效连接"); returnConnection(); } } catch (SQLException e) { log("从连接池" + name + "删除一个无效连接时错误"); System.out.println("从连接池" + name + "删除一个无效连接出错"); returnConnection(); } } return con; } /** * 从连接池获取可用连接.可以指定客户程序能够等待的最长时间 * 参见前一个getConnection()方法. * * @param timeout 以毫秒计的等待时间限制 */ public synchronized Connection getConnection(long timeout) { long startTime = new Date().getTime(); Connection con; while ((con = getConnection()) == null) { try { wait(timeout); } catch (InterruptedException e) {} if ((new Date().getTime() - startTime) >= timeout) { // wait()返回的原因是超时 return null; } } return con; } /** * 关闭所有连接 */ public synchronized void release() { Enumeration allConnections = freeConnections.elements(); while (allConnections.hasMoreElements()) { Connection con = (Connection) allConnections.nextElement(); try { con.close(); log("关闭连接池" + name + "中的一个连接"); } catch (SQLException e) { log(e, "无法关闭连接池" + name + "中的连接"); } } freeConnections.removeAllElements(); } /** * 关闭一个连接 */ public synchronized void releaseOne() { if (freeConnections.firstElement() != null) { Connection con = (Connection) freeConnections.firstElement(); try { con.close(); System.out.println("关闭连接池" + name + "中的一个连接"); log("关闭连接池" + name + "中的一个连接"); } catch (SQLException e) { System.out.println("无法关闭连接池" + name + "中的一个连接"); log(e, "无法关闭连接池" + name + "中的连接"); } } else { System.out.println( "releaseOne() bug......................................................."); } } /** * 创建新的连接 */ private Connection newConnection() { Connection con = null; try { if (user == null) { con = DriverManager.getConnection(URL); } else { con = DriverManager.getConnection(URL, user, password); } log("连接池" + name + "创建一个新的连接"); } catch (SQLException e) { log(e, "无法创建下列URL的连接: " + URL); return null; } return con; } } } ----------------------------------------------------------------------------------------------------------------- PoolMan.java: package pool; /** * Title: ConnectPool.java * Description: 数据库操作 * Copyright: Copyright (c) 2002/12/25 * Company: * Author : * remark : 加入指针回滚 * Version 2.0 */ import java.io.*; import pool.*; import java.sql.*; import java.util.*; import java.util.Date; import java.net.*; public class PoolMan extends ConnectPool { private ConnectPool connMgr; private Statement stmt; private Connection con; private ResultSet rst; /** *对象连接初始化 * */ public Connection getPool(String name) throws Exception { try { connMgr = ConnectPool.getInstance(); con = connMgr.getConnection(name); } catch (Exception e) { System.err.println("不能创建连接!请尝试重启应用服务器"); } return con; } /** * 2008-10-14 *对象连接初始化 * */ public Connection getPool(String name,String url) throws Exception { try { connMgr = ConnectPool.getInstance(url); con = connMgr.getConnection(name); } catch (Exception e) { System.err.println("不能创建连接!请尝试重启应用服务器"); } return con; } /** *同以上方法,加入连接空闲等待时间 *待用方法 * */ public Connection getPool_t(String name, long time) throws Exception { try { connMgr = ConnectPool.getInstance(); con = connMgr.getConnection(name, time); } catch (Exception e) { System.err.println("不能创建连接!"); } return con; } /** *执行查询方法1 * */ public ResultSet executeQuery(String SqlStr) throws Exception { ResultSet result = null; try { stmt = con.createStatement(); result = stmt.executeQuery(SqlStr); // here add one line by jnma 12.11 con.commit(); } catch (java.sql.SQLException e) { throw new Exception("执行查询语句出错"); } return result; } /** *执行查询方法2 * */ public ResultSet getRst(String SqlStr) throws Exception { // ResultSet result = null; try { stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); rst = stmt.executeQuery(SqlStr); // here add one line by jnma 12.11 con.commit(); } catch (java.sql.SQLException e) { throw new Exception("执行查询语句出错"); } return rst; } /** *执行更新 * */ public int Update(String SqlStr) throws Exception { int result = -1; try { stmt = con.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); result = stmt.executeUpdate(SqlStr); // here add one line by jnma 12.11 con.commit(); if (result == 0) { System.out.println("执行delete,update,insert SQL出错"); } } catch (java.sql.SQLException e) { System.err.println("执行delete,update,insert SQL出错"); } return result; } /** *执行事务处理 * */ public boolean handleTransaction(Vector SqlArray) throws Exception { boolean result = false; int ArraySize = SqlArray.size(); try { stmt = con.createStatement(); con.setAutoCommit(false); System.out.println("ArraySize is" + ArraySize); for (int i = 0; i < ArraySize; i++) { System.out.println(" 开始执行语句" + (String) SqlArray.elementAt(i)); stmt.executeUpdate((String) SqlArray.elementAt(i)); System.out.println(" 执行成功"); } con.commit(); con.setAutoCommit(true); //必须 System.out.println("事务执行成功"); result = true; } catch (java.sql.SQLException e) { try { System.out.println(e.toString()); System.out.println("数据库操作失败"); con.rollback(); } catch (java.sql.SQLException Te) { System.err.println("事务出错回滚异常"); } } try { con.setAutoCommit(true); } catch (java.sql.SQLException e) { System.err.println("设置自动提交失败"); } return result; } /** *释放连接 * */ public void close(String name) throws Exception { try { if (stmt != null) { stmt.close(); } if (con != null) { connMgr.freeConnection(name, con); System.out.println(" [c 正在释放一个连接 ] "); } } catch (java.sql.SQLException e) { System.err.println("释放连接出错"); } } } ----------------------------------------------------------------------------------------------------------- MyDB.java package db; import java.sql.*; import pool.PoolMan; import base.Constants; import java.util.List; import java.util.ArrayList; import java.util.HashMap; import java.util.Iterator; import org.apache.commons.beanutils.DynaBean; import org.apache.commons.beanutils.RowSetDynaClass; import java.util.Vector; import bean.Log; import bean.AdminBean; import base.FunctionStatic; import forms.system.DeptForm; import org.apache.commons.beanutils.BeanUtils; /* //数据层续承此类包 例如：public class Function extends MyDB {。。。。。。 注意：当调用数据层都必需关闭数据库 Function fun=new Function() fun.Close */ public class MyDB { public Connection conn = null; public ResultSet rs = null; public ResultSet rs1 = null; public java.sql.PreparedStatement prepar = null; public Statement stmt = null; public boolean flag = false; public java.sql.CallableStatement proc = null; public int pagecount = 0; public int pagedata = 0; PoolMan PoolMan = new PoolMan(); public MyDB() { //通过名称得到连接池 conn = PoolMan.getConnection(Constants.SYSTEM_DB_POOL_NAME); //System.out.println("连接成功"); } //关闭连接 public void Close() { try { if (rs != null) { rs.close(); } if (rs1 != null) { rs1.close(); } if (prepar != null) { prepar.close(); } if (proc != null) { proc.close(); } if (stmt != null) { stmt.close(); } if (conn != null) { conn.close(); } } catch (SQLException ex) { ex.printStackTrace(); } // System.out.println("关闭成功"); } public int executeSql(String sql)throws DbAccessException{ int flag = 0; try { stmt = conn.createStatement(); flag = stmt.executeUpdate(sql); // return flag; } catch (Exception e) { throw new DbAccessException("操作数据库出错"); }finally{ //return flag; } return flag; } //结果集的数据转存入List public List setResultToList(ResultSet rs) { List list = new ArrayList(); try { ResultSetMetaData md = rs.getMetaData(); /*获取结果集的列数*/ int columnCount = md.getColumnCount(); while (rs.next()) { HashMap map = new HashMap(); /*把每一行以(key,value)存入HashMap, 列名做为key,列值做为value */ for (int i = 1; i <= columnCount; ++i) { String tempStr = rs.getString(i); if (tempStr == null) { tempStr = ""; } map.put(md.getColumnName(i), tempStr); } /*把装有一行数据的HashMap存入list*/ list.add(map); } } catch (SQLException ex) { ex.printStackTrace(); } //System.out.println(list.size()); return list; } /* 结果集的数据转存入List 3hsjc selectsql:查询的字段 wheresql:查询条件的组合语句 sortsql：排序的组合语句 PageSize：每页显示的条数 PageNum：当前条数 tableName：表名 keyName：表中的主键字段名 页面调查方法： <%@page import="java.util.*"%> List list = (List) request.getAttribute("list"); //得到类包里存的值 if (list!=null){ for (int i = 0; i < list.size(); i++) { HashMap map = (HashMap) list.get(i); System.out.println(map.get("id")); //字段名同库字段名 } } */ public List getListByMap(String selectsql, String wheresql, String sortsql, int PageSize, int PageNum, String tableName, String keyName) { //获取 列表信息 List list = new ArrayList(); String sql = ""; try { if ("".equals(selectsql)) { selectsql = "*"; } if ("".equals(tableName) || "".equals(keyName)) { return null; } sql = "SELECT top " + PageSize + " " + selectsql + " FROM " + tableName + " WHERE 1=1 " + wheresql + " and " + keyName + " not in (select top " + PageSize * (PageNum - 1) + " " + keyName + " from " + tableName + " where 1=1 " + wheresql + sortsql + ")" + sortsql + ""; System.out.println("sql = " + sql ); stmt = conn.createStatement(); rs = stmt.executeQuery(sql); list = this.setResultToList(rs); return list; } catch (SQLException ex) { ex.printStackTrace(); } return null; } /* 结果集的数据转存入List 3hzyh selectsql:查询的字段 wheresql:查询条件的组合语句 sortsql：排序的组合语句 PageSize：每页显示的条数 PageNum：当前条数 tableName：表名 keyName：表中的主键字段名 页面调查方法： <%@page import="org.apache.struts.util.RequestUtils"%> <%@page import="org.apache.commons.beanutils.*"%> <%@page import="java.util.*"%> Vector list = (Vector) request.getAttribute("list"); //得到类包里存的值 if (list!=null){ for (int i = 0; i < list.size(); i++) { DynaBean info = (DynaBean) list.get(i); System.out.println(BeanUtils.getSimpleProperty(info,"id")); //字段名全小写 } } */ public Vector getList(String selectsql, String wheresql, String sortsql, int PageSize, int PageNum, String tableName, String keyName) { //获取 列表信息 Vector vector = new Vector(); String sql = ""; try { if ("".equals(selectsql)) { selectsql = "*"; } if ("".equals(tableName) || "".equals(keyName)) { return null; } sql = "SELECT top " + PageSize + " " + selectsql + " FROM " + tableName + " WHERE 1=1 " + wheresql + " and " + keyName + " not in (select top " + PageSize * (PageNum - 1) + " " + keyName + " from " + tableName + " where 1=1 " + wheresql + sortsql + ")" + sortsql + ""; System.out.println(sql); stmt = conn.createStatement(); rs = stmt.executeQuery(sql); /*对查询结果集RS进行行集的转换*/ RowSetDynaClass rsdc = new RowSetDynaClass(rs); /*把行集的每一行另存为LIST，以便存取操作*/ List rsDynaClass = rsdc.getRows(); Iterator itr = rsDynaClass.iterator(); int i = 0; while (itr.hasNext()) { i++; /*对LIST的每一行数据，动态生成虚拟BEAN*/ DynaBean dBean = (DynaBean) itr.next(); vector.add(dBean); } return vector; } catch (SQLException ex) { ex.printStackTrace(); } return null; } //====================================================================== //Created by linjunna 2009-08-13 //增加用户操作日志 /* ActionCode: 1:登录系统 2:...... */ public boolean InsertLog(Log log) { String sql = "INSERT INTO SU_UserLog(userName,note,userAction,ActionCode,dateCreated) VALUES (?,?,?,?,getdate() )"; int flag=0; try { prepar = conn.prepareStatement(sql); prepar.setString(1, log.getUserName()); prepar.setString(2, log.getNote()); prepar.setString(3, log.getUserAction()); prepar.setString(4, log.getActionCode()); flag = prepar.executeUpdate(); if (flag>1) return true; } catch (Exception ex) { } return false; } /* 函数说明：获取表中某一字段的值 参数说明你个：field:要获取字段的名称；keyName:判断的条件；keyValue:判断的条件的值；tableName:数据库表名 返回值说明：String */ public String getFieldValue(String field,String keyName,String keyValue,String tableName) { String result = ""; FunctionStatic fun = new FunctionStatic(); try { String sql = " select "+field+" from "+tableName+" where "+keyName+" ='" + keyValue + "' "; prepar = conn.prepareStatement(sql); rs = prepar.executeQuery(); while (rs.next()){ result = fun.getNullString(rs.getString(field)); break; } } catch (Exception e) { e.printStackTrace(); } return result; } /* 函数描述：修改表的某一字段 */ public int updateTableField(String TableName, String FieldName,String FieldValue, String PKID) { int ret = 0; String sql = "update ? set ? = ? where ID=?"; try { prepar = conn.prepareStatement(sql); prepar.setString(1, TableName); prepar.setString(2, FieldName); prepar.setString(3, FieldValue); prepar.setString(4, PKID); ret = prepar.executeUpdate(sql); } catch (Exception e) { e.printStackTrace(); } return ret; } /* 函数说明：批量删除 参数说明：FieldName:表的字段名；FieldValues：字段值,以逗号分隔，形式如："h0001,h0002,h0003,..." 返回值：整数 */ public int BatchDeleteByIds( String TableName, String FieldName,String FieldValues) { String[] strs=base.FunctionStatic.splitSkins(FieldValues,","); int flag = strs.length; try { conn.setAutoCommit(false); for (int i=0;i<strs.length;i++) { flag-= Delete(TableName,FieldName,strs[i]); } conn.commit(); } catch (Exception e) { try { conn.rollback(); } catch (SQLException ex) { ex.printStackTrace(); } e.printStackTrace(); } if (flag==0) return 1; else return 0; } /* 功能描述：根据表的主键id删除记录 参数：TableName为要删除记录的表名；tids为一个或多个主键id字符串，以逗号（,）隔开；AutoCommit为是否使用事务 author：曾令启 */ public int Delete(String TableName, String WhereSQL,boolean AutoCommit) { int flag = 0; try { String sql = ""; conn.setAutoCommit(AutoCommit); sql = " delete from " + TableName + " where 1=1 " + WhereSQL + " "; flag = executeSql(sql); conn.commit(); } catch (Exception e) { try { conn.rollback(); } catch (SQLException ex) { ex.printStackTrace(); } e.printStackTrace(); } return flag; } /** * 获得用于数据交换的主键ID，使用的存储过程为生成通用主键ID的PR_MakeMax_TYPK * @param @Bureau_id String 用户登录时选择的机构ID * @param @lab_Id String 用户登录时选择的实验室ID * @param @TableName String 表名 * @param @IDNewFormatOut String 输出的ID * @return String 可以返回以下格式的ID："Bureau_id+lab_id+0000000001" */ public String getExchangePKID(String Bureau_id,String lab_Id,String TableName) { String sql ="set nocount on begin declare @NewID varchar(50)" +" set @NewID=NULL" +" exec PR_MakeMax_TYPK N'', N'"+Bureau_id+"', N'"+lab_Id+"',N'"+TableName+"',@NewID out " +" select @NewID end "; String result =""; try{ prepar = conn.prepareStatement(sql); rs = prepar.executeQuery(); if (rs.next()) { result = rs.getString(1); } } catch(SQLException e){ e.printStackTrace(); } return result; } public String getExchangePKID(AdminBean ab,String TableName) { String result =""; result=getExchangePKID(ab.getLoginBureaus(),ab.getLoginLab(),TableName); return result; } //====================私有方法 start============================================================================= /* 功能描述：根据表的主键id删除记录 参数：TableName为要删除记录的表名；FieldName为数据表字段名；FieldValue为数据库表字段值 返回值：int。成功返回1，失败返回0 */ private int Delete(String TableName, String FieldName, String FieldValue) { int flag = 0; String where = " and " + FieldName + " ='" + FieldValue + "'"; flag = Delete(TableName, where); return flag; } //用于批量删除 private int Delete(String TableName, String WhereSQL) { int flag = 0; try { String sql = ""; sql = " delete from " + TableName + " where 1=1 " + WhereSQL + " "; flag = executeSql(sql); } catch (Exception e) { e.printStackTrace(); } return flag; } //====================私有方法 end============================================================================= public String getListToJason(String sql) throws Exception { StringBuffer jasonStr= new StringBuffer(); stmt = conn.createStatement(); rs = stmt.executeQuery(sql); ResultSetMetaData rsmd = rs.getMetaData(); RowSetDynaClass rsdc = new RowSetDynaClass(rs); List list = rsdc.getRows(); Iterator ite = list.iterator(); int resultCout = list.size(); jasonStr.append("{totalCount:"+String.valueOf(resultCout)).append(",data:["); while(ite.hasNext()){ DynaBean dyna = (DynaBean)ite.next(); jasonStr.append("{"); for(int i=1;i<=rsmd.getColumnCount();i++){ if (i==rsmd.getColumnCount()) jasonStr.append( rsmd.getColumnName(i)).append(":/"").append(BeanUtils.getSimpleProperty(dyna,rsmd.getColumnName(i).toLowerCase())).append("/""); else jasonStr.append( rsmd.getColumnName(i)).append(":/"").append(BeanUtils.getSimpleProperty(dyna,rsmd.getColumnName(i).toLowerCase())).append("/","); } jasonStr.append("},"); } String te = jasonStr.toString(); te = te.substring(0,te.length()-1)+"],success:true}"; return te; } public String getListToJason(String sql,int start,int limit) throws Exception { StringBuffer jasonStr= new StringBuffer(); stmt = conn.createStatement(); rs = stmt.executeQuery(sql); ResultSetMetaData rsmd = rs.getMetaData(); RowSetDynaClass rsdc = new RowSetDynaClass(rs); List list = rsdc.getRows(); int resultCout = list.size(); list = list.subList(start,start+limit); Iterator ite = list.iterator(); jasonStr.append("{totalCount:"+String.valueOf(resultCout)).append(",data:["); while(ite.hasNext()){ DynaBean dyna = (DynaBean)ite.next(); jasonStr.append("{"); for(int i=1;i<=rsmd.getColumnCount();i++){ if (i==rsmd.getColumnCount()) jasonStr.append( rsmd.getColumnName(i)).append(":/"").append(BeanUtils.getSimpleProperty(dyna,rsmd.getColumnName(i).toLowerCase())).append("/""); else jasonStr.append( rsmd.getColumnName(i)).append(":/"").append(BeanUtils.getSimpleProperty(dyna,rsmd.getColumnName(i).toLowerCase())).append("/","); } jasonStr.append("},"); } String te = jasonStr.toString(); te = te.substring(0,te.length()-1)+"],success:true}"; return te; } } ----------------------------------------------------------------------------------------------------------------------------- connect.properties drivers=net.sourceforge.jtds.jdbc.Driver #drivers=com.microsoft.jdbc.sqlserver.SQLServerDriver logfile=D://DBConnectPool-logfile.txt poolName.maxconn=100 poolName.url=jdbc:jtds:sqlserver://localhost:1433;DatabaseName=my_DB;tds=8.0;lastupdatecount=true #poolName.url=jdbc:jtds:sqlserver://localhost:1433;DatabaseName=my_db;tds=8.0;lastupdatecount=true poolName.user=sa poolName.password=